Clojure将多个地图合并为一个地图 [英] Clojure merge multiple map into a single map

问题描述

我有以下地图列表

({"child.search" {:roles #{"ROLE_ADM_UNSUBSCRIBE_SUBSCRIPTION" "ROLE_ADM_SEARCH_SUBSCRIPTION" "ROLE_ADM_VIEW_SUBSCRIPTION"}},
  "child.cc.search" {:roles #{"ROLE_ADM_CC_SEARCH_SUBSCRIPTION" "ROLE_ADM_CC_VIEW_SUBSCRIPTION"}}}
  {"child.abusereport" {:roles #{"ROLE_ADM_ABUSE_RPT"}},
   "child.manualfiltering" {:roles #{"ROLE_ADM_MANUAL_FILTERING_RPT"}}}
  {"child.assigned.advertisement" {:roles #{"ROLE_ADM_CREATE_ADVERTISING"}},
   "child.manage.advertisement" {:roles #{"ROLE_ADM_LIST_ADVERTISING"}}})

我需要一张像下面的地图.

I need to have a single map like following.

{"child.search" {:roles #{"ROLE_ADM_UNSUBSCRIBE_SUBSCRIPTION" "ROLE_ADM_SEARCH_SUBSCRIPTION" "ROLE_ADM_VIEW_SUBSCRIPTION"}}
"child.cc.search" {:roles #{"ROLE_ADM_CC_SEARCH_SUBSCRIPTION" "ROLE_ADM_CC_VIEW_SUBSCRIPTION"}}
"child.abusereport" {:roles #{"ROLE_ADM_ABUSE_RPT"}}
"child.manualfiltering" {:roles #{"ROLE_ADM_MANUAL_FILTERING_RPT"}}
"child.assigned.advertisement" {:roles #{"ROLE_ADM_CREATE_ADVERTISING"}}
"child.manage.advertisement" {:roles #{"ROLE_ADM_LIST_ADVERTISING"}}}

我该怎么办?

推荐答案

您可以使用" {} 作为第一个参数:

You can use the "into" function, and supply an empty map {} as the first argument:

(into {} map-list)

这是我的REPL会话的输出；我将您的代码复制到两个变量"map-list"和"single-map"(Clojure 1.3.0)中:

Here's the output from my REPL session; I copied your code into two vars 'map-list' and 'single-map' (Clojure 1.3.0):

(def map-list '({"child.search" {:roles #{"ROLE_ADM_UNSUBSCRIBE_SUBSCRIPTION" "ROLE_ADM_SEARCH_SUBSCRIPTION" "ROLE_ADM_VIEW_SUBSCRIPTION"}},
                 "child.cc.search" {:roles #{"ROLE_ADM_CC_SEARCH_SUBSCRIPTION" "ROLE_ADM_CC_VIEW_SUBSCRIPTION"}}}
                {"child.abusereport" {:roles #{"ROLE_ADM_ABUSE_RPT"}},
                 "child.manualfiltering" {:roles #{"ROLE_ADM_MANUAL_FILTERING_RPT"}}}
                {"child.assigned.advertisement" {:roles #{"ROLE_ADM_CREATE_ADVERTISING"}},
                 "child.manage.advertisement" {:roles #{"ROLE_ADM_LIST_ADVERTISING"}}}))

#'user/map-list
user=>
(def single-map {"child.search" {:roles #{"ROLE_ADM_UNSUBSCRIBE_SUBSCRIPTION" "ROLE_ADM_SEARCH_SUBSCRIPTION" "ROLE_ADM_VIEW_SUBSCRIPTION"}}
                 "child.cc.search" {:roles #{"ROLE_ADM_CC_SEARCH_SUBSCRIPTION" "ROLE_ADM_CC_VIEW_SUBSCRIPTION"}}
                 "child.abusereport" {:roles #{"ROLE_ADM_ABUSE_RPT"}}
                 "child.manualfiltering" {:roles #{"ROLE_ADM_MANUAL_FILTERING_RPT"}}
                 "child.assigned.advertisement" {:roles #{"ROLE_ADM_CREATE_ADVERTISING"}}
                 "child.manage.advertisement" {:roles #{"ROLE_ADM_LIST_ADVERTISING"}}})
#'user/single-map

user=>
;; Check to see if we have the desired result
(= (into {} map-list)
   single-map)
true

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